Bump cryptiles and coveralls

Removes [cryptiles](https://github.com/hapijs/cryptiles). It's no longer used after updating ancestor dependency [coveralls](https://github.com/nickmerwin/node-coveralls). These dependencies need to be updated together.


Removes `cryptiles`

Updates `coveralls` from 2.11.16 to 3.1.1
- [Release notes](https://github.com/nickmerwin/node-coveralls/releases)
- [Commits](https://github.com/nickmerwin/node-coveralls/commits/3.1.1)

---
updated-dependencies:
- dependency-name: cryptiles
  dependency-type: indirect
- dependency-name: coveralls
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>